Did You Know...
...that it was melting ice cream that inspired the invention of the outboard motor? It was a lovely August day and Ole Evinrude was rowing his boat to his favorite island picnic spot. As he rowed, he watched his ice cream melt and wished he had a faster way to get to the island. At that moment the idea for the outboard motor was born!
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| Number | Title | Issue Date |
| 8115436 | Motor control apparatus and motor system In a motor control apparatus, apparatus all switching devices of all phases of an inverter are kept fixed at OFF in accordance with a value of an all-OFF control pulse signal Poff outputted by a pulse generator. The pulse generator generates at least twice a pulse c... | 02/14/2012 |
| 7944163 | Sensorless controlling apparatus of brushless motor A sensorless controlling apparatus for controlling a brushless motor includes a speed calculator for calculating speed of a rotor ω, an angle calculator for calculating rotor angle θ at a predetermined time interval, and an angle controller for calculating correct... | 05/17/2011 |
| 7800333 | Audible noise reduction for single current shunt platform A method for reducing audible motor noise in a motor drive, wherein the motor drive includes a motor controller driving a PWM space vector modulator providing gating pulses to an inverter providing phase currents to the phase windings of the motor, and wherein phase... | 09/21/2010 |
| 7449858 | Variable-Structure diagnostics approach achieving optimized low-frequency data sampling for EMA motoring subsystem The present invention provides a diagnostics methodology and embedded electronic system that allows optimized low-frequency data sampling for EMA motoring subsystems in an operating vehicle. Each of the EMA motoring subsystems includes: an EMA; at least one motor fo... | 11/11/2008 |
| 7436145 | Method and apparatus for controlling brushless DC motors in implantable medical devices Methods and apparatus for controlling a polyphase motor in implantable medical device applications are provided. In one embodiment, the polyphase motor is a brushless DC motor. The back emf of a selected phase of the motor is sampled while a drive voltage or the sel... | 10/14/2008 |
| 7397212 | DC motor phase estimation with phase-locked loop A DC motor phase estimation algorithm that estimates a speed-related harmonic frequency of a DC motor current under dynamic load conditions having known geometry parameters. The algorithm estimates the phase and magnitude of a complex coefficient in a complex single... | 07/08/2008 |
| 7348757 | Circuit to improve motor phase current reconstruction via DC link Apparatus for reconstructing the phase currents of a multiphase load driven by a multiphase inverter fed by a DC link and controlled by a PWM controller, the apparatus including a sensor in the DC link, first and second sampling arrangements for sampling the current... | 03/25/2008 |
| 7345446 | Method of controlling movable member driven by electric motor Method of controlling a movable member driven by an electric motor by monitoring current circulating through the electric current and ripples therein. The method including detecting current peaks and count the number of current peaks falling within sampling windows ... | 03/18/2008 |
| 7304444 | Battery vehicle and method of controlling the same A battery vehicle includes a battery configured to supply DC power, and first and second motors configured to drive first and second wheels in response to first and second motor drive powers, respectively. A first inverters generates a first control data and supplie... | 12/04/2007 |
| 7276877 | Sensorless control method and apparatus for a motor drive system A method and apparatus provide a state observer control system 600 for a motor 106 that uses an extended Kalman filter 330 to predict initial rotor position and afterwards accurately predict rotor position and/or speed under variable types of lo... | 10/02/2007 |
| 7256891 | Sensor alignment apparatus for an analysis system An apparatus for analyzing a population of particles is set forth. The apparatus includes an emitter adapted to generate a beam of electromagnetic radiation, such as from a laser, and a particle chamber disposed in a path of the electromagnetic radiation beam. The a... | 08/14/2007 |
| 7211982 | Variable-structure diagnostics approach achieving optimized low-frequency data sampling for EMA motoring subsystem The present invention provides a diagnostics methodology and embedded electronic system that allows optimized low-frequency data sampling for EMA motoring subsystems in an operating vehicle. Each of the EMA motoring subsystems includes: an EMA; at least one motor fo... | 05/01/2007 |
| 7190144 | System and method for adjusting a PID controller in a limited rotation motor system An adjustment system is disclosed for adjusting a proportional, integral, derivative controller in a limited rotation motor system. The adjustment system includes a first transform unit, a second transform unit, a model identification unit, and a PID adjustment unit... | 03/13/2007 |
| 7187142 | Motor drive with velocity noise filter A drive unit for controlling a motor includes a position feedback device and a velocity noise filter. The position feedback device is operable to generate a position signal relating to a position of the motor. The velocity noise filter is coupled to the position fee... | 03/06/2007 |
| 7170248 | Systems and methods for operating a barrier Disclosed are systems and methods for operating a barrier. In one embodiment, a door operator can be opened or closed by triggering either an internal device (e.g., wall button) or an external device. In one embodiment, if an obstacle is detected when the door is op... | 01/30/2007 |
| 7138776 | Method and apparatus for controlling brushless DC motors in implantable medical devices Methods and apparatus for controlling a polyphase motor in implantable medical device applications are provided. In one embodiment, the polyphase motor is a brushless DC motor. The back emf of a selected phase of the motor is sampled while a drive voltage of the sel... | 11/21/2006 |
| 7123984 | Threading control method and apparatus therefor A threading control method and apparatus therefor is provided, in which, when carrying out thread-cut machining operations several times at one position, synchronized with main-spindle rotation and controlling movement of a threading spindle, deviations in thread gr... | 10/17/2006 |
| 7109670 | Motor drive with velocity-second compensation An apparatus for use with a signal generator and a motor controller includes a velocity compensator, an adjustor, and a velocity regulator. The signal generator provides a reference velocity signal, and the motor controller receives an output signal and uses the out... | 09/19/2006 |
| 7106547 | Method and apparatus for determining embedded runout correction values using feedback A method and apparatus for determining embedded runout correction values uses a closed-loop system (with feedback) in a disk drive. Optionally, the embedded runout correction values may be determined after the disk drive has been manufactured and placed in the field... | 09/12/2006 |
| 7106542 | Method and apparatus for determining embedded runout correction values when self-servo writing or partial self-servo writing a disk drive A method and apparatus for determining embedded runout correction values when self-servo writing or partial self-servo writing is disclosed. In one embodiment, a disk surface, which has servo information written thereon, is provided. The servo information is grouped... | 09/12/2006 |
| 7054096 | Method and apparatus for determining embedded runout correction values A method and apparatus for compensating for non-linearities due to pivot bearing friction when determining embedded runout correction values during partial self-servo write of a disk drive is disclosed. In one embodiment, the disk drive includes a disk surface havin... | 05/30/2006 |
| 7049784 | Drive voltage generating apparatus and method for controlling the same A first drive voltage generating section corresponds to a first motor, and a second drive voltage generating section corresponds to a second motor. Each of the first drive voltage generating section and the second drive voltage generating section includes switching ... | 05/23/2006 |
| 7015670 | Method of controlling a high-friction electro-mechanical servo-mechanism to minimize the power needed to hold a loaded output member The invention provides a method for controlling an electromechanical servomechanism (20) for moving an output member relative to a variable load (38). The servomechanism includes: a motor (37) having at least one coil (32A, 32B or ... | 03/21/2006 |
| 7016775 | Controller and control method for an electric power steering apparatus A controller controls an electric motor to provide assist power corresponding to steering operation for an electric power steering apparatus. The controller comprises a detecting device, a filtering device, a judging device and a determining device. The detecting de... | 03/21/2006 |
| 6995944 | Head positioning control method for a storage device and head positioning control device A head positioning method and device positions a head which reads disk-type storage medium at a specified location, and accurately estimates estimates a bias value during settling control. A disk device includes a disk medium, a head, an actuator , and a control cir... | 02/07/2006 |
| 6992454 | Motor controller and method for measuring characteristics of mechanism A detector (20) detects the position of a motor, and a differentiator (26) calculates the speed of the motor from the position of the motor. An command generation section (11) fixes a position command to a current position. A position control se... | 01/31/2006 |
| 6963196 | Output termination auto detection circuit for an input device An output termination auto detection circuit includes a reference resistance having one side coupled to a known input voltage and selectively coupled into a signal line of an input device. The other side of the reference resistance is coupled to an output terminal o... | 11/08/2005 |
| 6963184 | Adaptable spatial notch filter A spatial notch filter is described that adapts in accordance with changes to an angular velocity of a rotating component within a manufacturing system. In a manufacturing system, noise may appear in feedback signals due to spatially distributed physical features in... | 11/08/2005 |
| 6950265 | Method and apparatus for servo defect management A system and method for managing servo defects in a data storage device. During operation of the device, a servo sector recorded on a medium is identified. A lookup is performed in a servo defect table resource to determine whether the servo sector contains defectiv... | 09/27/2005 |
| 6947249 | Method and apparatus for automatically determining an embedded runout correction threshold A method and apparatus for automatically determining an embedded runout correction threshold for a disk drive are disclosed. In prior systems, embedded runout correction thresholds were set for all disk drives in a production run. The present invention provides a te... | 09/20/2005 |
| 6903528 | Machine model estimating device of electric motor control apparatus A machine model estimating device of an electric motor control apparatus having an electric motor for driving a load machine, a rotation detector for detecting a rotating angle of the electric motor, and a servo control device for controlling the electric motor. The... | 06/07/2005 |
| 6888331 | Commutation of sensorless direct-current motors The invention relates to a sensorless commutation of a direct-current motor. To allow an exact, easy to design, flexible, and highly integratable circuit arrangement for commuting motor devices, analogue phase detectors are replaced by digital devices, in particular... | 05/03/2005 |
| 6831466 | Method and system for sensor fault detection A system and method for controlling operation of a component include using at least two sensors arranged to sense an operating condition of the component. The system further includes a controller that controls the component in response to feedback signals output by ... | 12/14/2004 |
| 6518719 | Power tools with operating speed control circuit A variable speed power tool may include a speed adjusting device and/or a maximum speed adjusting device for adjusting the operating speed, and a fixed operating speed switch. An operator adjustable speed adjusting device having a position maintaining mec... | 02/11/2003 |
| 6487458 | Adaptive closed-loop servo control A closed-loop control of a servo motor in which multiple closed-loop terms of a motor command are adaptively tuned and selectively activated to achieve both stable operation and improved performance. The motor command includes a first term proportional to... | 11/26/2002 |
| 6294891 | Systems and methods for robust vibration suppression in a motion control system Systems and methods for reducing unwanted vibration in motion system are provided using a Robust Vibration Suppression (RVS) methodology, in which acceleration frequency spectra are obtained for each of a number of command input functions developed for mo... | 09/25/2001 |
| 6291962 | Offset control circuit and offset control method When a playback signal of recorded data which is a DC free code has non-linearity, the playback signal is equalized by a waveform equalization unit, and sampled by an analog-to-digital converter. The sample data is binarized, and an offset amount is detec... | 09/18/2001 |
| 6252366 | Device for digitally slaving the position of a moving part Device for digitally slaving the position of a moving part, including: a digital sensor (20) which is intended to measure the actual position of the moving part (10) and delivers a digital effective position value, drive means comprising an electric motor... | 06/26/2001 |
| 6211640 | Motor drive control system A motor control unit (1) includes a white noise generator (8), an instruction switch (9) for switching between an input control instruction (Vins) and a white noise output of the white noise generator (8), a controller (10) for feedback controlling the mo... | 04/03/2001 |
| 6184645 | Voltage mode drive for control circuit for an actuator using sampled back EMF control An apparatus for controlling an actuator in response to a target speed voltage signal, the actuator having a moveable member and having a coil that influences movement of the member. A first summing node is provided having a control output voltage, for su... | 02/06/2001 |
